Appendix B: Algorithms
B–16
TDS 500D, TDS 600B, & TDS 700D User Manual
Measurements on Envelope Waveforms
Time measurements on envelope waveforms must be treated differently from
time measurements on other waveforms, because envelope waveforms contain so
many apparent crossings. Unless otherwise noted, envelope waveforms use either
the minima or the maxima (but not both), determined in the following manner:
1. Step through the waveform from to until the sample min and max
pair DO NOT straddle .
MidRef
Both min and max
samples are above
MidRef, so use minima.
MidRef
Both min and max
samples are below
MidRef, so use maxima.
Figure B–4: Choosing Minima or Maxima to Use for Envelope Measurements
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